Astronomy and Astrophysics – Astrophysics – Galaxy Astrophysics
Scientific paper
2009-11-18
Astronomy and Astrophysics
Astrophysics
Galaxy Astrophysics
9 pages, 2 figures, to appear in the proceedings of the IAU Symp. 265 Chemical Abundances in the Universe: Connecting First St
Scientific paper
We discuss recent observations of stars located close to the symmetry plane of the Milky Way, and examine them in the context of theories of Galaxy formation and evolution. The kinematics, ages, and compositions of thin disk stars in the solar neighborhood display complex patterns, and interesting correlations. The Galactic disk does not seem to pose any unsurmountable obstacles to hierarchical galaxy formation theories, but a model of the Milky Way able to reproduce the complexity found in the data will likely require a meticulous study of a significant fraction of the stars in the Galaxy. Making such an observational effort seems necessary in order to make a physics laboratory out of our own galaxy, and ultimately ensure that the most relevant processes are properly understood.
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